Tuesday, 29 December 2020

Stolen Jade boulder recovered

A massive jade boulder stolen from the front of a shop in Cache Creek has been recovered. Cariboo Jade and Gifts announced the 2,800-pound boulder was found intact.
Worth upwards of $50k to the right person, the rock was stolen on Dec. 19.

A group of thieves used an excavator on a flatbed to lift the rock onto the trailer towed by a brown pickup truck. The truck and trailer were later found dumped in Kamloops, but the stone and excavator were still missing. A photo posted to Facebook by Cariboo Jade and Gifts shows the boulder where it was dumped by the crooks.

Monday, 28 December 2020

Sapphire from Baffin Island, Nunavut - Beluga spinel

The Beluga spinel has an unusually intense blue colour with the chromophore (colouring agent) being cobalt.
In 2002, gem quality blue sapphire was discovered in the Canadian Arctic, near the hamlet of Kimmirut.

In late 2005 True North Gems discovered an extremely rare, cobalt-rich variety of spinel.
Gemstone exploration, with the exception of diamonds, is not common in Canada. A decade ago, emerald mineralization was discovered in the Yukon, Northwest Territories and Ontario which generated a brief period of interest.

There have also been sapphire discoveries in British Columbia, Nunavut and Ontario.
These discoveries led to a number of scientific papers but gemstone mining remains a speculative and unfamiliar market for most.

Saturday, 26 December 2020

Boghossian emerald necklace - $7m

A Boghossian emerald necklace was top lot of a recent Christies sale on November 30, 2020. The necklace made US$7m breaking the record for a selection of no oil Colombian emeralds set in May 2017.

The Emerald Tzar of Colombia

Víctor Carranza (8 October 1935 – 4 April 2013) was a Colombian emerald dealer and the owner of emerald mines in the Boyacá mountains.

Carranza was involved in the Muzo mining area outside Boyacá, Colombia from the 1980s until his death. Various forces clashed during the Green War, including Pablo Escobar and the Medellin Cartel, leftist guerrilla groups and right wing paramilitaries. Carranza remained in control of Colombia's emerald trade during this period. Carranza controlled at 40% of Colombia’s emerald business, which supplies about two thirds of the world’s stones.
Before the signing of a peace pact in 1991, an estimated 3,000 people were killed in fighting for control of the business.

As cancer spread, his hold on power slipped, and the peace pact started to unravel. He survived at least two assassination attempts.
The emerald tsar brought a relative peace to the industry.

Carranza claimed emeralds “called to him”.
Slipping production is likely the reason behind the rise in the price of Colombian emeralds, which spiked 30 per cent in 2017, according to industry experts.

Friday, 25 December 2020

Melo pearl

Melo pearls are large and non-nacreous, and are found naturally in the Melo Melo sea snail. Pearls fall into one of two varieties, nacreous and non-nacreous. Nacreous pearls are formed out of the material nacre and generally have a high luster. Non-nacreous pearls are generally less valuable with some exceptions. Melo pearls are one.
Most pearls in jewelry are cultured by farmers under controlled conditions, but there are some natural pearls whose origins can’t be created. The Melo Melo pearl is among them, making them extremely valuable. Melo Melo pearls can take decades to grow to significant size.
The Melo Melo is found in Southeast Asia, Burma, Thailand, Malaysia, the South China Sea and the Philippines.

Monday, 21 December 2020

Umba Sapphire

The most famous Tanzanian sapphires are 'African padparadschas.'
Umba sapphire is a unique type of sapphire discovered in 1962 in the Gerevi Hills, north of the Umba River in the Umba Valley of Tanzania. Umba sapphires exhibit coloration not common to sapphires sourced from other parts of the world. At a small bend in the Umba River near the Kenyan border, a unique two-mile-radius deposit produces just about every color of sapphire imaginable.
Umba sapphires are mainly known for their range of orange-red, orange, and orangy golden yellow colors. These unique colors are due to various coloring elements including chromium, manganese, iron , titanium, and high proportions of vanadium.
The gem gravel of the Umba River Valley has been a major source of sapphires for at least a half century. The area also yields rare color-change sapphires.

Sunday, 20 December 2020

Diamond hearts shine

$3.1m (Red) $1.9m (Orange)

The heart-shape diamonds fetched $10.5m (fancy blue) and $8.1m (fancy pink), respectively.

The Graff Venus weighs 118.78 carats, D colour, Type IIA.
The Heart of Eternity is a heart-shaped 27.64 carat fancy vivid blue diamond. Because of its color, size, and clarity, the Heart of Eternity is one the world's most valuable gems. In 2000 it sold for $16m.

The Argyle Amour Diamond weighs 2.61 carats and is the most valuable heart-shaped diamond discovered at the Argyle Diamond mine.

Saturday, 19 December 2020

Orange Diamonds

The largest fancy-vivid orange diamond known to exist sold for 32.6 million Swiss francs ($36 million) at Christie’s International in Geneva in late 2013.

The 14.82-carat pear-shaped stone’s price was about $2.4 million per carat, this was a per-carat record for any colored diamond at a public sale. The gem also set a record for an orange diamond of its type.
Light Orange, Fancy, Fancy Intense Orange, Fancy Vivid Orange and Fancy Deep Orange

Orange Diamonds may contain a brown, yellow or pinkish modifying color.
Pure Orange diamonds are impossibly rare. Most diamonds contain some nitrogen. In orange diamonds the nitrogen atoms have grouped themselves in a very specific way. This happens during and right after the diamond is formed. Nitrogen arrangements absorb light in the blue and yellow region of the spectrum producing an orange color.
The strength of colour is one of the most important factors in determining the value of a natural color diamond. The value increases exponentially with the intensity of the most prominent colour within the diamond.
A 4.08-Carat Fancy Vivid Orange Diamond Ring blew past it's US$1.6 – 1.8 million estimate at Sotheby's Hong Kong auction in April 2016, bringing $ 2.3m

The 'Mandarin Orange' is a 4.19-Carat Fancy Vivid Orange Diamond. It sold for $2.9 million in 2011.
The Pumpkin Diamond is 5.54 carats and rated as Fancy Vivid Orange by the GIA. Halle Berry wore the ring to the 2002 Oscars where she won the Academy Award for Best Actress for her role in Monster's Ball. The popularity of orange diamonds zoomed.

2.00-carat, fancy vivid orange, heart-shaped Lady Orquidea Diamond
50.34 carat marquise-shaped Natural Fancy Deep Brown-Orange diamond. $1.1m.

Fancy Vivid Orange Yellow & Fancy Brown Orange Pink IF Pear Shape Diamond TW 10.62cts.